Isotopes are those nuclei of an element that have:
Correct answer: D. Same atomic number but different mass number
- A. Same mass number but different atomic number
- B. Same mass number as well as atomic number
- C. Different mass number as well as atomic number
- D. Same atomic number but different mass number
Explanation
The isotopes of an element have the same number of protons and electrons, but different numbers of neutrons. So the atomic number would be the same and the mass number or atomic mass would be different.
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